Choose the true statement from the following all of the inner transition metals are radioactive. all of the inner transition metals are rare. all of the inner transition metals have valence electrons in an f orbital. all of the inner transition metals are bigger than the main group elements. i think its the last one.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Ineed ! i have no clue how to do this problem.

Which sentence from holes contains an implied personality trait? stanley and his parents had tried to pretend that he was just going away to camp for a while, just like rich kids do. he'd just been in the wrong place at the wrong time. stanley felt somewhat dazed as the guard unlocked his handcuffs and led him off the bus. stanley nodded to show he understood